MAHLE P&Cs MYSTERY::??????

[Kiwi912]

Can anyone help identify the contents of two Mahle boxes from the Mahle part numbers?

I can't seem to find anywhere that translates the numbers into a model or even a Porsche part number.

I'm learning slowly about 911's so any help would be appreciated.

First set; Mahle 503 24 00 STD
Six Mahle 79.97mm Dia Pistons, Rings, Pins
1.5mm top groove
2mm middle
4mm bottom

Narrowed it down to
2.0L 911?
68-69 911T or 65-69 E or L?
Am I on the right track? How can I tell which it is?

Second set; Mahle 503 45 90 EH5
Five (should be six but that is another story!) Mahle 83.97mm Pistons, Rings, Pins, clips, Cylinders.
I haven't taken the P's out of the C's to measure ring grooves. Do I have to?

I've worked out they're either 2.2 or 2.4 ???
From there I get lost with CIS and MI? No idea about either? and a multitude of compresions?
Where do I begin.

I like the idea of having a 911 to plant in the 912 one day so some of the parts may come in handy one day!

Cheers for any help you can give.

[Wayne 962]

If they have a asymetrical dome in the top, then they are CIS...

-Wayne

[Kiwi912]

Wayne
The top dome is symetrical, (spherical) but the valve cutaways are a little different to each other.
Not CIS?

[Early_S_Man]

Kiwi,

Most definitely either carbed or MfI ... the valve releif cuts are not identical because the intake and exhust valves are not the same diameter! Pics would help a lot.

[Kiwi912]

Early_S
Hope this works!

[Kiwi912]

IT worked!!!!
I'll try another!!!!